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<h1 class="topictitle1">创建文件扩展名过滤规则</h1>
<div id="body0000001676473709"><p id="ZH-CN_TOPIC_0000002200876205__p10163346565">系统预置了已知勒索文件扩展名过滤规则，并默认关联系统中的所有文件系统。进行文件拦截时，系统会侦测文件系统中的文件扩展名是否和文件扩展名过滤规则相同，文件系统中相同扩展名文件的创建、打开和重命名行为将被阻止。您可以根据业务需求新创建要拦截的文件扩展名过滤规则。</p>
<div class="section" id="ZH-CN_TOPIC_0000002200876205__section9646162911282"><h4 class="sectiontitle">操作步骤</h4><ol id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_ol159217814715"><li id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001283108982_zh-cn_topic_0000001166366216_zh-cn_topic_0000001091431193_li1570821013536"><span>在导航栏选择“<span id="ZH-CN_TOPIC_0000002200876205__text0486163811356">数据安全</span> &gt; <span id="ZH-CN_TOPIC_0000002200876205__text56981229133613">文件拦截</span>”。</span></li><li id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_zh-cn_topic_0000001166366216_zh-cn_topic_0000001091431193_li12591123311535"><span>进入<span class="uicontrol" id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_uicontrol151981616171611">“<span id="ZH-CN_TOPIC_0000002200876205__text18400753114114">文件扩展名过滤规则</span>”</span>页签，单击<span class="uicontrol" id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_uicontrol17308229244">“<span id="ZH-CN_TOPIC_0000002200876205__text4859152854719">创建</span>”</span>。</span><p><p id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_p24069190226">系统右侧弹出“<span class="uicontrol" id="ZH-CN_TOPIC_0000002200876205__uicontrol18561195355016">“<span id="ZH-CN_TOPIC_0000002200876205__text4561753185011">创建</span>”</span>”对话框。</p>
<p id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_p184581835143819"><span><img id="ZH-CN_TOPIC_0000002200876205__image15586164011522" src="zh-cn_image_0000002165355540.png"></span></p>
<p id="ZH-CN_TOPIC_0000002200876205__p12342338161314"></p>
</p></li><li id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_li1236704561811"><span>设置文件扩展名过滤规则的参数。</span><p><p id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_p4779111121910">相关参数如<a href="#ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_table373910544193">表1</a>所示。</p>

<div class="tablenoborder"><a name="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_table373910544193"></a><a name="zh-cn_topic_0000001337156461_table373910544193"></a><table cellpadding="4" cellspacing="0" summary="" id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_table373910544193" frame="border" border="1" rules="all"><caption><b>表1 </b>文件扩展名过滤规则参数</caption><colgroup><col style="width:22.1%"><col style="width:77.9%"></colgroup><thead align="left"><tr id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_row9739135420196"><th align="left" class="cellrowborder" valign="top" width="22.1%" id="mcps1.3.2.2.3.2.2.2.3.1.1"><p id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_p673965415198">参数名称</p>
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<th align="left" class="cellrowborder" valign="top" width="77.9%" id="mcps1.3.2.2.3.2.2.2.3.1.2"><p id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_p6739125421915">参数说明</p>
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<tbody><tr id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_row47391054181917"><td class="cellrowborder" valign="top" width="22.1%" headers="mcps1.3.2.2.3.2.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_p27393548197">拦截文件扩展名</p>
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<td class="cellrowborder" valign="top" width="77.9%" headers="mcps1.3.2.2.3.2.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_p16739175417199">拦截文件的扩展名。支持填写一个或多个拦截文件扩展名。</p>
<p id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_p35134612237">[取值范围]</p>
<ul id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_ul19507182614253"><li id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_li165071226112512">长度为1～127个字符。</li><li id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_zh-cn_topic_0000001159963183_li18249801">单个文件扩展名只能由数字、字母、空格或特殊字符（!"#$%&amp;'()*+-./:;&lt;=&gt;?@[\]^_`{|}~）组成，通配符“*”只能位于最后一个字符并且不能单独存在。</li><li id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_li1678595195014">多个文件扩展名请以","分隔。</li></ul>
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</p></li><li id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_li5766134019479"><span>单击<span class="uicontrol" id="ZH-CN_TOPIC_0000002200876205__zh-cn_topic_0000001337156461_uicontrol6305372472">“<span id="ZH-CN_TOPIC_0000002200876205__text10165101775317">确定</span>”</span>。</span></li></ol>
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<div class="parentlink"><strong>父主题：</strong> <a href="zh-cn_topic_0000002200876185.html">配置文件拦截（事前拦截）</a></div>
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